172129696 has 12 divisors (see below), whose sum is σ = 338880402. Its totient is φ = 86064832.

The previous prime is 172129691. The next prime is 172129729. The reversal of 172129696 is 696921271.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 91776400 + 80353296 = 9580^2 + 8964^2 .

It is not an unprimeable number, because it can be changed into a prime (172129691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2689495 + ... + 2689558.

Almost surely, 2^172129696 is an apocalyptic number.

172129696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172129696 is a deficient number, since it is larger than the sum of its proper divisors (166750706).

172129696 is an equidigital number, since it uses as much as digits as its factorization.

172129696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5379063 (or 5379055 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 172129696 is about 13119.8207304826. The cubic root of 172129696 is about 556.2695241053.

The spelling of 172129696 in words is "one hundred seventy-two million, one hundred twenty-nine thousand, six hundred ninety-six".